This is a note to let you know that I've just added the patch titled
drm/ast: Fix test for VGA enabled
to the 4.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-ast-fix-test-for-vga-enabled.patch
and it can be found in the queue-4.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 905f21a49d388de3e99438235f3301cabf0c0ef4 Mon Sep 17 00:00:00 2001
From: "Y.C. Chen" <yc_chen@xxxxxxxxxxxxxx>
Date: Wed, 22 Feb 2017 15:10:50 +1100
Subject: drm/ast: Fix test for VGA enabled
From: Y.C. Chen <yc_chen@xxxxxxxxxxxxxx>
commit 905f21a49d388de3e99438235f3301cabf0c0ef4 upstream.
The test to see if VGA was already enabled is doing an unnecessary
second test from a register that may or may not have been initialized
to a valid value. Remove it.
Signed-off-by: Y.C. Chen <yc_chen@xxxxxxxxxxxxxx>
Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Acked-by: Joel Stanley <joel@xxxxxxxxx>
Tested-by: Y.C. Chen <yc_chen@xxxxxxxxxxxxxx>
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/ast/ast_post.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
--- a/drivers/gpu/drm/ast/ast_post.c
+++ b/drivers/gpu/drm/ast/ast_post.c
@@ -58,13 +58,9 @@ bool ast_is_vga_enabled(struct drm_devic
/* TODO 1180 */
} else {
ch = ast_io_read8(ast, AST_IO_VGA_ENABLE_PORT);
- if (ch) {
- ast_open_key(ast);
- ch = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xb6, 0xff);
- return ch & 0x04;
- }
+ return !!(ch & 0x01);
}
- return 0;
+ return false;
}
static const u8 extreginfo[] = { 0x0f, 0x04, 0x1c, 0xff };
Patches currently in stable-queue which might be from yc_chen@xxxxxxxxxxxxxx are
queue-4.10/drm-ast-fix-ast2400-post-failure-without-bmc-fw-or-vbios.patch
queue-4.10/drm-ast-call-open_key-before-enable_mmio-in-post-code.patch
queue-4.10/drm-ast-fix-test-for-vga-enabled.patch